* what means PROV_class-native = ""?
@ 2013-01-18 21:35 Robert P. J. Day
2013-01-18 21:45 ` Martin Jansa
0 siblings, 1 reply; 4+ messages in thread
From: Robert P. J. Day @ 2013-01-18 21:35 UTC (permalink / raw)
To: OE Core mailing list
perusing oe-core for examples to demonstrate the concept of
"PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc:
PROV = "virtual/update-alternatives"
PROV_class-native = ""
PROVIDES += "${PROV}"
i'm not sure what to make of that -- what's the purpose of assigning
to PROV, then subsequently assigning to PROVIDES, but with that
PROV_class-native = ""
line in between? i did a grep and saw nothing else like it throughout
oe-core.
rday
--
========================================================================
Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
========================================================================
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: what means PROV_class-native = ""? 2013-01-18 21:35 what means PROV_class-native = ""? Robert P. J. Day @ 2013-01-18 21:45 ` Martin Jansa 2013-01-18 21:57 ` Saul Wold 0 siblings, 1 reply; 4+ messages in thread From: Martin Jansa @ 2013-01-18 21:45 UTC (permalink / raw) To: Robert P. J. Day; +Cc: OE Core mailing list [-- Attachment #1: Type: text/plain, Size: 1435 bytes --] On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote: > > perusing oe-core for examples to demonstrate the concept of > "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc: > > PROV = "virtual/update-alternatives" > PROV_class-native = "" PROV is variable with no special meaning class-native is standard override for native recipe (like virtclass-native was before). > PROVIDES += "${PROV}" > > i'm not sure what to make of that -- what's the purpose of assigning > to PROV, then subsequently assigning to PROVIDES, but with that > > PROV_class-native = "" > > line in between? i did a grep and saw nothing else like it throughout > oe-core. > > rday > > -- > > ======================================================================== > Robert P. J. Day Ottawa, Ontario, CANADA > http://crashcourse.ca > > Twitter: http://twitter.com/rpjday > LinkedIn: http://ca.linkedin.com/in/rpjday > ======================================================================== > > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core -- Martin 'JaMa' Jansa jabber: Martin.Jansa@gmail.com [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 205 bytes --] ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: what means PROV_class-native = ""? 2013-01-18 21:45 ` Martin Jansa @ 2013-01-18 21:57 ` Saul Wold 2013-01-18 22:06 ` Robert P. J. Day 0 siblings, 1 reply; 4+ messages in thread From: Saul Wold @ 2013-01-18 21:57 UTC (permalink / raw) To: Robert P. J. Day; +Cc: Martin Jansa, OE Core mailing list On 01/18/2013 01:45 PM, Martin Jansa wrote: > On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote: >> >> perusing oe-core for examples to demonstrate the concept of >> "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc: >> >> PROV = "virtual/update-alternatives" >> PROV_class-native = "" > > PROV is variable with no special meaning > class-native is standard override for native recipe (like > virtclass-native was before). > >> PROVIDES += "${PROV}" >> >> i'm not sure what to make of that -- what's the purpose of assigning >> to PROV, then subsequently assigning to PROVIDES, but with that >> >> PROV_class-native = "" >> >> line in between? i did a grep and saw nothing else like it throughout >> oe-core. >> I believe that idea is since it's PROVIDES += , not a straight assignment like = it's not a simple to override with the +=, so for the target case PROVIDE the virtual/u-a, but not for the native case of that package. If it was a straight assignment (using =) the ${PROV} would not be needed. Sau! >> rday >> >> -- >> >> ======================================================================== >> Robert P. J. Day Ottawa, Ontario, CANADA >> http://crashcourse.ca >> >> Twitter: http://twitter.com/rpjday >> LinkedIn: http://ca.linkedin.com/in/rpjday >> ======================================================================== >> >> _______________________________________________ >> Openembedded-core mailing list >> Openembedded-core@lists.openembedded.org >> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core > > > > _______________________________________________ > Openembedded-core mailing list > Openembedded-core@lists.openembedded.org > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core > ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: what means PROV_class-native = ""? 2013-01-18 21:57 ` Saul Wold @ 2013-01-18 22:06 ` Robert P. J. Day 0 siblings, 0 replies; 4+ messages in thread From: Robert P. J. Day @ 2013-01-18 22:06 UTC (permalink / raw) To: Saul Wold; +Cc: Martin Jansa, OE Core mailing list On Fri, 18 Jan 2013, Saul Wold wrote: > On 01/18/2013 01:45 PM, Martin Jansa wrote: > > On Fri, Jan 18, 2013 at 04:35:34PM -0500, Robert P. J. Day wrote: > > > > > > perusing oe-core for examples to demonstrate the concept of > > > "PROVIDES =", and i ran across this in recipes-devtools/dpkg/dpkg.inc: > > > > > > PROV = "virtual/update-alternatives" > > > PROV_class-native = "" > > > > PROV is variable with no special meaning > > class-native is standard override for native recipe (like > > virtclass-native was before). > > > > > PROVIDES += "${PROV}" > > > > > > i'm not sure what to make of that -- what's the purpose of assigning > > > to PROV, then subsequently assigning to PROVIDES, but with that > > > > > > PROV_class-native = "" > > > > > > line in between? i did a grep and saw nothing else like it throughout > > > oe-core. > > > > I believe that idea is since it's PROVIDES += , not a straight > assignment like = it's not a simple to override with the +=, so for > the target case PROVIDE the virtual/u-a, but not for the native case > of that package. > > If it was a straight assignment (using =) the ${PROV} would not be > needed. i thought it was something like that, i just wanted to make sure. as martin pointed out, there's nothing magical about the PROV variable, so i could just as easily have used, say, RDAY instead of PROV as it was purely temporary, right? rday -- ======================================================================== Robert P. J. Day Ottawa, Ontario, CANADA http://crashcourse.ca Twitter: http://twitter.com/rpjday LinkedIn: http://ca.linkedin.com/in/rpjday ======================================================================== ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-01-18 22:22 UTC | newest] Thread overview: 4+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2013-01-18 21:35 what means PROV_class-native = ""? Robert P. J. Day 2013-01-18 21:45 ` Martin Jansa 2013-01-18 21:57 ` Saul Wold 2013-01-18 22:06 ` Robert P. J. Day
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